github - ghsa-j4cv-xr5r-hq23

ghsa-j4cv-xr5r-hq23

Vulnerability from github

Published

2024-05-20 12:30

Modified

2024-05-20 12:30

Details

In the Linux kernel, the following vulnerability has been resolved:

mm/hugetlb: fix missing hugetlb_lock for resv uncharge

There is a recent report on UFFDIO_COPY over hugetlb:

https://lore.kernel.org/all/000000000000ee06de0616177560@google.com/

350: lockdep_assert_held(&hugetlb_lock);

Should be an issue in hugetlb but triggered in an userfault context, where it goes into the unlikely path where two threads modifying the resv map together. Mike has a fix in that path for resv uncharge but it looks like the locking criteria was overlooked: hugetlb_cgroup_uncharge_folio_rsvd() will update the cgroup pointer, so it requires to be called with the lock held.

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  "affected": [],
  "aliases": [
    "CVE-2024-36000"
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  "id": "GHSA-j4cv-xr5r-hq23",
  "modified": "2024-05-20T12:30:30Z",
  "published": "2024-05-20T12:30:30Z",
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cve-2024-36000

Vulnerability from cvelistv5

Published

2024-05-20 09:48

Modified

2024-11-05 09:26

Severity ?

Summary

mm/hugetlb: fix missing hugetlb_lock for resv uncharge

References

▼	URL	Tags
	https://git.kernel.org/stable/c/4c806333efea1000a2a9620926f560ad2e1ca7cc
	https://git.kernel.org/stable/c/f6c5d21db16a0910152ec8aa9d5a7aed72694505
	https://git.kernel.org/stable/c/538faabf31e9c53d8c870d114846fda958a0de10
	https://git.kernel.org/stable/c/b76b46902c2d0395488c8412e1116c2486cdfcb2

Impacted products

▼	Vendor	Product
	Linux	Linux
	Linux	Linux

Show details on NVD website

JSON

To clipboard

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Sightings

Author	Source	Type	Date

Nomenclature

Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
Confirmed: The vulnerability is confirmed from an analyst perspective.
Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
Patched: This vulnerability was successfully patched by the user reporting the sighting.
Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
Not confirmed: The user expresses doubt about the veracity of the vulnerability.
Not patched: This vulnerability was not successfully patched by the user reporting the sighting.

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